Motor-control gear of motor-tractors.



b. MON. WALLACE.

MOTOR CONTROL GEAR 0F MOTOR TRACTGRS- APPLICATlON FILED SEPT. X9, 191.7.

1,282,334, Pat-efited Oct. 22, 1918.

2 SHEETSr-SHEET 1.

i). MCN. WALLACE.

MQTOR comaoL GEAR UP MOTOR m Aciifis.

. APPLICATION FILED SEPT. i9. 1917.. 1,282,334. Patelltfid 00c. 22, 1918,

2 SHEETS-SHEET 2.-

' gear connections.

DUNCAN MQNAUGHTGN WALLACE, (3F GLASGOW, SCQTLAND.

MOTOR-CGNTBOL GEAR/.05 "MOTOR-TRACTORS.

Specification of Letters Patent.

Patented cm. 22, 1918.

Application filed September 19, 1917. Serial'No. 192,173.

To all whom it may concern of Motor-Tractors, of which the following is a specification. Thisinven'tion relates to motor tractors designed for drawing plows, cultivators, or other agricultural implements of the class characterized by a pivotal or trailingframe to which the agricultural implement can be connected or attached. I

The object of the invention is to provide improved means whereby the motor can be readily controlled from the rear of the piv-- otal frame. Under this invention the motor controls, which work through the pivot center, have their connecting parts, at the pivot center. made in such manner as'to insure a steady and uniform action, no matter what angle. during the steering of thetractor. the pivotal frame may assume relatively to the motor frame. The control rods are caused to impart angular movements to members which act on collars slidablv fitted on a vertical pivot pin so as to move the collars up or down said pin. the collars. in their turn. imparting angular movements to other memberswhich actuate the controls.

fIn order that the invention may be clearly understood I have hereunto appended an ex planatory sheet of drawings Whereon I have shown the improved motor control gear.

Figure 1 is a general View showing; the

control gear and also such parts of the motor tractor, in outline, as are necessary to clearly understand the invention.

Fig. 2 is a plan of part of same.

Referring to the drawings a represents the usual motor frame with its tractor wheels and any suitable driving motor 0. d is an upward extension of the trauma to which the trailing- :trame 6, a is pivotecl 7 is the steering pinionwhich engages with the internally toothed quadrant g of the motor frame, it is the rod for turn in the worm gear for rotating the pinion and i is the steering Wheel at the rear end of the rod. By turning the wheel 2' the motor tractor. moving about its pivot, is v Fi 3 is an enlarged view of the control steered, as desired, through the operation of the pinion and quadrant.

There are three controls shown on the drawing. the one 7c being for the brake, the one I for the clutch and the one m for reversing'the motor.

Under this invention the three control rods M, P, and m operate, respectively. three arms 0, 0 0 on short shafts p, 19 2 upon which are secured toothed segments is, Z 971 which, in their turn. engage with collars 7s Z m slidably fitted on the pivot pin Thcse'collars. again. on the opposite side, engage with corresponding toothed segments Zt, Zfl m adapted to actuate through bell crank arms the rods Z". 111". connected respectively with the brake. the clutch, and the motor reversing gear. Each collar is made with a series of parallel circumferential teeth and each pair of segments engage the teeth of its intermediate collar from opposite sides, so that the collar is held in position between the two senments and can be moved steadily and uniformly up and down the pivot pin by the movement of its control rod. If. for instance. the rod is moved. the movement is transmitted to the segment 10 and collar k which again transmits the movement to the segment k 'and motor brake control k X0 matter what angle. during the steering of the tractor by the gear f. l the pivotal frame may assume relatively to the motor frame. the segments always remain in gear with the'coll'ai's and always transmit the con- .trol movements through them in a steady and uniform manner. ments would be slightly curved to "correspond with the circumference of the collars.

Of course, toothed sectors could be used instead of segments.

Having now fully described my invention what I claim and .desire to secure by Letters Patent is 2. A control gear, for motor tractors having a pivotal-rear frame, comprising two The teeth of the segtoothed and angularly movable members and a shdable member intermediate said an- Igularly movable members and adapted to transmit movement from the one to the other,

- 3. A control gear, for motor tractors hav i'ng pivotal rear frame, comprising two -'ing a pivotal rear frame, comprising'two toothed and angularly movable members and a cylindrical slidable member with parallel teeth thereon the member being arranged intermediate said angularly movable members and being adapted to transmit movement fromthe one to the other.

5. A. control gear, for motor tractors having a pivotal rear frame, comprising a toothed member, a sliding collar With parallel circumferential teeth, a pivot pin on which said collar can slide, and a second engaging'the teeth of the collars.

6.- A control gear, for motor tractors having a pivotal rear frame, comprising a toothed member, means for imparting angular movement tothe same,- asliding collar with parallel circumferential teeth, a pivot pin on which said collar can slide, a second toothed member and means for controlling the motor connected with the second memher, the teeth of the members engaging the teeth of the. collars.

T. A control gear, for motor tractors having a pivotal rear frame, comprising control rods. angularl'vmovable members operated by the rods. a pivot pin. members slidable upon the pin, andmoved by the said members, and other angularly movable, members moved bythe slidable members to. operate the motor control gear.

In testimony whereof I afiix my signature in presence of two witnesses.

DUNCAN MCNAUGHTON WALLACE. \Vitnesses HUGH D.. FITZPA'IRICK, \VILLIA-u GALL. 

